Roller weir



Nov. 26, 1929. F. DUWE 1,736,850

ROLLER WEIR Fi led Jan. 25, 1928 Y Inventor:

Patented Nov. 26, 1929 v .UNITED STATES PATENT OFFICE FRIEDRICH DU'WE,OF MAINZ, GERMANY, ASSIGNOR T MASCHINENFABRIK AUG-S- IBURG-NURNBERG A.G., OF NUREMBERG, GERMANY, A CORPORATION OF GER- MANY ROLLER WEIRApplication filed January 25, 1928, Serial No. 249,321, and in GermanyAugust 18, 1927.

My invention consists in additional improvements of the device describedin my copending application Ser. No. 165,740 which relates to a devicefor opening and closing extension gates provided on the roller-bodies ofroller-weirs by means of the winch which serves for lifting and loweringsaid rollerbody.

Heretofore in devices of this kind the roller-body could only be liftedand lowered with the extension gate in fully laid-down condition. Mypresent invention consists in an improved construction, which permitsthe lifting and lowering of the roller-body independently of thecondition of the latter, and more especially also where theextensiongate is in its uppermost or in any intermediate position. For thispurpose the device de scribed in my above-mentioned application is used,wherein the chain of the winch is slidingly guided upon an end bearingof the roller-body. Essentially my invention consists in this, that inaddition to the stationary stops which limit the motion of the chain incondition of no-load, a stopping device is used for the respective partof the chain, said stop,- ping device being adapted to be engaged witheach of the members of the chain passing said device and permitting aregulation of the motion of the chain in every condition of load betweenzero-load and maximum load which is determined by said stationary stops.

The drawing shows in Fig. 1 a side elevation of a drum weir and gateembodying my invention, Fig. 2 is a section through one end of theweir-drum and Fig. 3 a top plan view of Fig. 1. I

The endless chain 1) is driven by means of the pinion a of the winch andcarried around the drum-body d by means of guiding members 0 shown inFig. 2. In the lowered position of the drum (1, the chain 6 is releasedfrom the load of the weir and may, therefore, slide upon the drum bodybetween the guiding members 0. Co-axially to the weir drum 0? and theparts of the chain b passing around the drum there is arranged a two-armlever 1 1 projecting through slots 2, 2", provided in the wall of thedrum. The chain 6 in the lowered position of the drum will be inengagement with the arm 1 of said lever, which arm in this position ofthe weir is downwardly directed, while the other arm 1 is arranged so asto come into engagement with the chain 12 aft-er the laying down of theextension gate lc, or after the drum d has been turned to a certainangle, before the arm 1 is disengaged from chain 5. Another lever 4 ismounted upon the shaft 3 of the twoarm lever 1*, 1", and is connectedwith the movable extension gate is by a link 5 (Fig. 1). Chain 5 isfurther provided with a stop m at a point between the driving pinion, aof the winch and a guiding roller 7" provided in the rear of said winch,said stop co-operating with fixed abutments o and p. A suspension device9 of well known kind is provided for suspending chain 6 in a pluralityof parts, as indicated'in Fig. 1, said parts being wound up during thelifting of the drum d.

A stop-lever Zis rotatably mounted near the guiding roller 7' for thechain I) being adapted to be inserted by means of the hand-lever 2 intoeach member of the chain 6 leaving the guiding roller 1*. For thispurpose a recess 3 is provided at the end of said lever Z, which willengage from below with a bolt 4 of the chain 1) which at the time ispassing said guiding roller r; in this manner the chain may be kept inposition. I I

The mode of operation of the construction according to my invention isas follows:

In order tolay down the movable extension gate is, the winch is causedto rotate as indicatedby the arrow at the upper part of Fig. 1. Thechainb, which is relieved of the'weight of the drum d, will then startto move under no-load and slide upon the drum at the ends thereofbetweenthe guide members 0. Thereby the arm 1 of the two-arm lever 1 1', whichis in engagement with the chain 1) is caused to rotate in the directionas indicated by the arrow at the lower part of Fig. 1, and by the lever4 and the link 5, the movable extension gate k will be laid down.Meanwhile the stop m of the chain 6 has travelled from the abutment 0 t0the abutment 7), so that further movement of the chain 1) will bestopped. Now, if the drum (1 shall be raised, the rotation of the winchis simply continued,

whereby the chain side running upon the pinion a will be wound up, thewound up parts being then kept in plurally suspended sections by thesuspension device 9. During the raising of the weir drum d, the latteris positively guided by its gear rim and the rack z, and will move intothe upper position as indicated by the broken lines in Fig. 1.

During this movement of the Weir drum the arm 1 of the lever 1, 1", hasbecome disengaged from the chain 1). However, the door is can not swingaway again from the drum d into open position, because the arm 1 hascome into engagement with the chain 1) ere the arm 1 has left the chain.The arm 1', after having engaged the chain b, rests in engagement withthe chain until the drum d has attained its upper position as indicatedby dotted lines in Fig. 1; the door is is thus held closed. If, beforestarting the Winch, the stop-lever Z is moved into operative position,the chain 6 will be no more in no-load 1 condition and the roller cl maybe lifted while the gate is is in fully erected position. If it I isdesired to partly lay down the gate is, the

chain 6 is started to move in condition of noload through a part of thedistance between the stops 0 and p and the stop-lever Z is thereuponmoved to engage the chain at a desired point, so that the chain will nowbe kept in position and the weir drum (Z may be lifted in erectedposition of the gate is.

I claim:

1. In a drum weir, a drum, an extension gate hinged thereto, a chainadapted to pass around said drum in sliding engagement therewith,stationary stops for said chain,

' an additional stopping device adapted to engage said chain at anydesired point so as to control the motion of said chain between zeroloadand a maximum load as determined by said stationary stops, and means foroperating said additional stopping device at will.

2. The combination, a's'specified by-claim 1, wherein said additionalstopping device consists in a pivotally mounted lever adapted to engagethe chain at any desired point.

3. The combination, as specified by claim 1, wherein said additionalstopping device consists in a guiding roller for said chain and apivotally mounted lever having a recess at its free end adapted toengage said chain at any desired point while passing over said guidingroller, so as to frictionally press said chain against said guidingroller.

In testimony whereof I aflix my signature. I FRIEDRICH DUWE.

